cn.nukkit.inventory.transaction.action.TradeAction Maven / Gradle / Ivy

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package cn.nukkit.inventory.transaction.action;

import cn.nukkit.Player;
import cn.nukkit.api.PowerNukkitXOnly;
import cn.nukkit.api.Since;
import cn.nukkit.entity.passive.EntityVillager;
import cn.nukkit.item.Item;
import cn.nukkit.nbt.tag.CompoundTag;
import cn.nukkit.network.protocol.types.NetworkInventoryAction;

@PowerNukkitXOnly
@Since("1.19.21-r1")
public class TradeAction extends InventoryAction {
    private final EntityVillager villager;
    private final int type;

    public TradeAction(Item sourceItem, Item targetItem, int windowId, EntityVillager villager) {
        super(sourceItem, targetItem);
        this.type = windowId;
        this.villager = villager;
    }

    @Override
    public boolean isValid(Player source) {
        if (type == NetworkInventoryAction.SOURCE_TYPE_TRADING_INPUT_1) {
            var result1 = false;
            var result2 = false;
            for (var tag : villager.recipes.getAll()) {
                var cmp = (CompoundTag) tag;
                if (cmp.containsCompound("buyA")) {
                    var buyA = cmp.getCompound("buyA");
                    result1 = buyA.getByte("Count") == targetItem.getCount() && buyA.getByte("Damage") == targetItem.getDamage()
                            && buyA.getString("Name").equals(targetItem.getNamespaceId());
                    if (targetItem.hasCompoundTag()) {
                        result1 = simpleVerifyCompoundTag(targetItem.getNamedTag(), buyA.getCompound("tag"));
                    }
                }
                if (cmp.containsCompound("buyB")) {
                    var buyB = cmp.getCompound("buyB");
                    result2 = buyB.getByte("Count") == targetItem.getCount() && buyB.getByte("Damage") == targetItem.getDamage()
                            && buyB.getString("Name").equals(targetItem.getNamespaceId());
                    if (targetItem.hasCompoundTag()) {
                        result2 = simpleVerifyCompoundTag(targetItem.getNamedTag(), buyB.getCompound("tag"));
                    }
                }
                if (result1 || result2) {
                    return true;
                }
            }
            return false;
        } else if (type == NetworkInventoryAction.SOURCE_TYPE_TRADING_OUTPUT) {
            var result = false;
            for (var tag : villager.recipes.getAll()) {
                var cmp = (CompoundTag) tag;
                if (cmp.contains("sell")) {
                    var sell = cmp.getCompound("sell");
                    result = sell.getByte("Count") == sourceItem.getCount() && sell.getByte("Damage") == sourceItem.getDamage()
                            && sell.getString("Name").equals(sourceItem.getNamespaceId());
                    if (sourceItem.hasCompoundTag()) {
                        result = simpleVerifyCompoundTag(sourceItem.getNamedTag(), sell.getCompound("tag"));
                    }
                }
                if (result) {
                    return true;
                }
            }
            return false;
        }
        return false;
    }

    @Override
    public boolean execute(Player source) {
        return true;
    }

    @Override
    public void onExecuteSuccess(Player source) {

    }

    @Override
    public void onExecuteFail(Player source) {
    }

    public int getType() {
        return type;
    }

    //由于sourceItem是数据包解析传输来的,sell是直接物品getNamedTag,这两者NBT会有所不同,不能直接比较。
    private boolean simpleVerifyCompoundTag(CompoundTag NBT1, CompoundTag NBT2) {
        var result = false;
        //如果有附魔 比较附魔
        if (NBT1.contains("ench") && NBT2.contains("ench")) {
            result = NBT1.get("ench").equals(NBT2.get("ench"));
        }
        //如果有改名 比较改名
        if (NBT1.contains("display") && NBT2.contains("display")) {
            result = NBT1.get("display").equals(NBT2.get("display"));
        }
        return result;
    }
}